公开(公告)号：US10965245B2

公开(公告)日：2021-03-30

申请号：US16159204

申请日：2018-10-12

Applicant: LG ELECTRONICS INC.

Inventor： Dongho Han ,  Hyunho Do ,  Juhwan Yun

IPC: H02S40/32 ,  H02J3/38 ,  H02S40/34 ,  H04B3/54 ,  H02J13/00 ,  H01L31/02 ,  H02J7/35

Abstract: According to an embodiment of the present invention, there is provided a photovoltaic module including a photovoltaic solar cell, a converter to convert a level of a direct current power from the photovoltaic solar cell, an inverter to convert the direct current power from the converter into an alternating current power, a controller to control the converter and the inverter, and a communication unit to perform electric power line communication with a gateway and at least one nearby photovoltaic module, in which the communication unit periodically transmits communication state information to the gateway and the at least one nearby photovoltaic module using the electric power line communication, and receives a message transmitted by the gateway along a path determined according to the communication state information.

公开(公告)号：US11005267B2

公开(公告)日：2021-05-11

申请号：US16450448

申请日：2019-06-24

Applicant: LG ELECTRONICS INC.

Inventor： Dongho Han ,  Giyob Park ,  Myonghwan Kim ,  Yunsu Bae

IPC: H02J3/38 ,  H02M3/335 ,  H02S40/32 ,  H02S40/34 ,  H01L31/02 ,  H01L31/048 ,  H02J3/46 ,  H02S50/00

Abstract: A photovoltaic module includes a solar cell module including multiple solar cells, and first and second conductive lines connected respectively to first and second solar cells among the solar cells, and a junction box attached to the solar cell module. The junction box includes a power conversion unit including a capacitor unit located between the first and second conductive lines, a converter unit to change the level of a DC voltage at opposite ends of the capacitor unit and to output the DC voltage, and a controller to control the converter unit. When shading occurs in some of the solar cells, the power conversion unit supplies a second current, the level of which is lower than the level of a first current supplied before shading occurs, whereby the possibility of generation of a hot spot may be reduced despite the absence of bypass diodes when shading occurs.

公开(公告)号：US10381839B2

公开(公告)日：2019-08-13

申请号：US15459350

申请日：2017-03-15

Applicant: LG ELECTRONICS INC.

Inventor： Dongho Han ,  Giyob Park ,  Myonghwan Kim ,  Yunsu Bae

IPC: H02J3/38 ,  H02J3/46 ,  H01L31/02 ,  H02M3/335 ,  H02S40/32 ,  H02S40/34 ,  H02S50/00 ,  H01L31/048

Abstract: A photovoltaic module includes a solar cell module including multiple solar cells, and first and second conductive lines connected respectively to first and second solar cells among the solar cells, and a junction box attached to the solar cell module. The junction box includes a power conversion unit including a capacitor unit located between the first and second conductive lines, a converter unit to change the level of a DC voltage at opposite ends of the capacitor unit and to output the DC voltage, and a controller to control the converter unit. When shading occurs in some of the solar cells, the power conversion unit supplies a second current, the level of which is lower than the level of a first current supplied before shading occurs, whereby the possibility of generation of a hot spot may be reduced despite the absence of bypass diodes when shading occurs.

公开(公告)号：US09716466B2

公开(公告)日：2017-07-25

申请号：US14479120

申请日：2014-09-05

Applicant: LG ELECTRONICS INC.

Inventor： Dongho Han ,  Myonghwan Kim ,  Myungsoo Ham ,  Hyunho Do

IPC: H02M3/24 ,  H02S40/32 ,  H02S40/34 ,  H04B3/54 ,  H02J3/38 ,  H02M7/48 ,  H02J13/00 ,  H02M3/28 ,  H02M1/00

CPC classification number: H02S40/32 ,  H02J3/383 ,  H02J13/0031 ,  H02M3/285 ,  H02M7/48 ,  H02M2001/007 ,  H02S40/34 ,  H04B3/54 ,  H04B2203/5416 ,  Y02E10/563 ,  Y02E40/72 ,  Y04S10/123

Abstract: A power conversion apparatus, a photovoltaic module, and a communication device and a photovoltaic system including the same are discussed. The power conversion apparatus includes an inverter unit to perform alternating current (AC) voltage conversion based on direct current (DC) voltage from a solar cell module, a controller to control the inverter unit, and a communication unit to add a carrier frequency signal containing predetermined information to the converted AC voltage and output the AC voltage containing the predetermined information to a grid and, when a level of the converted AC voltage is equal to or less than a predetermined level, to add the carrier frequency signal containing the predetermined information to DC voltage and output the DC voltage containing the predetermined information to the grid. Consequently, it is possible to stably transmit information.